Adhesive



March M. 0. JENNINGS ET AL 1,704,089

' ADHESIVE APPLYING AND PRESSING MACHINE Filed Oct. 21, 1925 5Sheets-Sheet 1 2 II-II 5-- /9 fizz r Ma O 9 O o i f4 L "l :f' f9 March1929- M. 0. JENNINGS ET AL. 1,704,039

ADHESIVE, APPLYING AND P RESSING MACHINE Filed Oct. 21, 1925 5Sheets-Sheet 2 March 5, 1929. 'M. 0. JENNINGS ET AL ADHESIVE APPLYINGAND PRESSING MACHINE Filed Oct. 21, 1925 5 Sheets-Sheet ZMIZTW March1929. 0. JENNINGS ET AL 1,704,089

ADHESIVE APPLYING AND PRESSING MACHINE Filed Oct. 21. 1925 5Sheets-Sheet 4 ZZZ! Jig/ 72i 71 75ml,

{/3 a fizzy/ya March 1929. M. 0. JENNINGS ET Al.

ADHESIVE APPLYING AND PRESSING MACHINE Filed Oct. 21, 1925 Patented Mar,5, 1929. v I

-. units; 'rA'rss MELVIN 0. JENNINGS, or Aarrneron HEIGHTS, AND LYMAN E,ALLEY, or NORTH CAMBRIDGE, MASSACHUSETTS, ASSIGNOB-S 'ro HARRY I-I.IBECKWITH, 0F BROOK- LINE, MASSACHUSETTS.

FADHESIVE APPLYING AND PRESSIN G MACHINE.

Application filed October 21, 1925. Serial No. 63,914.

This invention in its broadest aspects relates to a machine for applyingan adhesive to a material priorto the superposition or placementotanothermaterial thereover, and for uniting both materialsunderpre'ssure.

More particularly, this invention has relation to a machine for applyingan adhesive to a box toe stifi'ener or blank, after which it vmay besuperposed by the machine operator on the toe of a shoe upper and bothparts may be united or bound together by subjecting them to pressure.Theobject of the present invention is to provide a machine for carryingout such operations in an eflicient and economical manner.

In accordance with the present invention,

.a suitable adhesive is first applied to and properly distributed overone surface ofthe blank, after which it is assembled with the upper, andboth parts are united under pres sure. 1 For permitting this'operationto be accomplished, the machine of the present in-' vention, generallystated,.comprises a magazine into which a plurality of blanks may bestacked and guided in proper position and alinement to anadhesive-applying roll. The roll contacts with the under surface of thelowermost blank and distributes adhesive thereonto near its rear edgeportion, after which it engages the blank and suiiicientlyv rier iscaused to travel in the direction of the confronting surfaces of therolls only while they are in pressing engagement with each other, in amanner to cause the parts placed between the rolls to be fed forwardlyin the nip of therolls and out of the machine. The 7 sequence 01""operations performed by the machine is so timed that the various stepsin the process are coordinated; that is to say, duringthe application ofadhesive to a blank, the press rolls are brought and maintained inpressing engagement with each other, but when a blank has been ejectedor pushed forward from the magazine after the application of adhesivethereto so that it may be grasped by the operator for assembly in theupper, the pressedparts are ejected from the machine by the carrier andthe rolls are separated or brought out of pressing engagement with oneanother, so that the parts to be united under pressure may be placedtherebetween. 'VVith these and other features and ob ects 1 n view, themachine embodying the present invention includes certain novel featuresof construction, combinations and arrangements of parts, as will be morefully hereinafter described in con unction with the accompanyingdrawings, wherein Figure 1 represents in front elevation a machineembodying the present invention.

Figure 2 represents a plan View of th same. 1

Figure 3 shows a transverse section through the machine, illustratingthe lower press roll lowered out of pressing engagement with the upperpress roll and ready for the placement of the parts to be unitedtherebetween.

igure 4 is a section through the machine similar, to Figure 3, butillustrating the lower press roll raised into pressing engagement withthe upper press rolls, and the parts to be united under pressure placedtherebetween.

Figure 5 is an end elevation of the machine, showing the drivingmechanism for the several'rolls.

Referring to the drawings, at 1 is indicated a tank or receptacle forcontaining the adhesive or gum to be applied to the'blank. Any suitableadhesive may be employed, but for the particular purpose at hand athermoplastic adhesive or cement which is rendered adhesive and plasticor semi-fluid under the application of heat, and. which congeals orhardens and loses its adhesiveness at ordi' from a rheostat control unitindicated as whole at {.l, by means of which the amount oi? currentsupplied to the heatmg device may The device is supplied tin 'nesscs tobe thrust forward from the/ma yond the plate and its rear portion rest.be regulated. The conductors 3, 3 are preferably intercepted by theswitch 5, so that the current to the heating device may be turned on oroil, desired.

The adhesive is applied to the lowermost blank B by theadhesive-applying roll 7, which is journaled for rotation on conespindles 8, 8 protruding laterally from the sides of the tank andengaging in niatng openings formed at the ends of the roll.

The roll is partially submerged in the adhesive and in rotation thereinbecOnres coated Wi'tll tle' adhesive and deposits a lilin on the undercc of the lowermost blank contacting there with at its rear edgeportion. For ejecting or pushing the blank forward from the ethc blanksof the stack sulliciontly so that i be grasped by the machine operatormoved from the magazine, the roll is ed with a series of prongs 12,arranged gitu'dinally of its periphery, which c; the blank after theapplication of t sive for a complete revolution 0" the roll feed orthrust it frontwardly under l guide 14-, which constitutes a member 0magazine. To allow blanks of dillereut by the roll while holding backthe bh ..ks s perposed on the blank to be ejected, th

guide ll is adjustablysupporter. by a vertical" leg of the angle piece24, by screws 2E t'xcd thereto and passing through an e ongated verticalslot 24? formed in the leg. By loosening the screws, the guide may bemoved up or down to allow the ejection of a blank of any thickness fromthe magazine The horizontal leg of the piece 24. is adji' stably securedto a transverse bar 18 carried by vertical rods l9, 19, which are fixedto a cross strut 20 of the frame. The adjustment is allordedby means ofthe bolts 21, 21, which extend through an elongated slot22 formed in theangle piece 2 3:. By loosening the bolts 21, 21, the guide ll may thusbe adjusted toward and away from the stack of blanks, depending on theparticular sized blank being utilized.

The magazine also comprises the plate 1' for supporting the stack ofblanks, secured to the flange 16 proj ectin fron 1y at the upper-edgeportion of the fron of the tank. 'lhe stack of blanks is siren vrlcd onthe plate, its 'ljront portion extendurg bc- 'iiig on the roll 7 so thatthe under face of the lowermost blank contacts wi th the roll. as :ireiujly indicated, near its rear edge. The blank is preferably made tocontact with the roll under pressure, so that an eilicient applicationand uniform distribution of adhe iv, effected upon b This pressingaction on the blanks may be produced by a weight 27, placed on the topof the stack and having an opening formed therethrough' ati'ts rearportion, for a guiding post 28. The no '1 is 1+ )fU 7 L I threadedat itsbutt end and screwec into 'ness of the upper roll o will. be

and secured in place by fixing nuts to a plate 80 extenein across theopen top of the tank,

and the end portions 38, 88 of this plate are right 31, 31 of the frameby angle pieces 32, 32. As a detail of COZlStlHClJlOIl, the screws forfastening the angle piece to the plate may extend though the sides ofthe tank, as well through the portions 38, 38, thus serving to supporttherear end of the tank. The front end of the tank may be fixed to across-piece 39 secured to the'vertic al rods 19,19. Y I

The plate 30 also serves to support vertical rear guides forming a partof the maga- Zine whicn maintains the stack of blanks that they may bepresented in proper position to the adhesive-applying roll 7. Theseguides are constructed in the form of anguilar vertial mon'ibers 35,adjustable tow rd and away from each other in a manner to permit blanksof differ nt widths to be: acconiuiiodated therebetween. Theadjustability is 116C011)- plished by .nnrunting each member on a base40 provided with an. elongated slot ll. through which a screw for fixingthe base to the plate 30 extends. By loosening the screw, the guide maybe moved toum'd or away from the other guide as desired...

' Pa. g now to a description of the niech-' anisin or subjecting theassembled parts to pressure, as previously indicated, the machine compr'tation immediately under the tank, and a rotatabl lower r 51. adapted tobe reciprocated into and out in'cssing engagement therewith durine there ion of the rolls. The roll is ournaled or rotation at. either end ":1a block 52, whic 1 dable away from the lower p ess roll. 1 p the latterbroughtnp into press V o'tlllifillli therewith..llothisend,beariiiigadowngainst on block is a coi'npression ipringt..-, the ion portion ojliwhich estends into an opening; 53 formed inthe upper portion of the block, and which is maintained in proper positon and alincrneut by a'pin project g Fri 'dly from the base the opcningiinto the Similarly, tee upper portion of the extends into an opeuii eformed in vh istixod by bol cal upright 31. For 1":

exerted on the parts :0 be n a disc 58 re s on the s rine; a i against3' a se screv-J through the block 56 bears. guide the nu reme it of thebio p :o' id-ed. with bolts 60, r former, in the upriuhts 31,31. 7' I inthe blocks G2. 62, which are mm; e. i tiramc in a manner to permitreciproca es an upper roll 50 mounted for rothereof into and out ofpressing engagement with the upper roll. To this end each block isslidably supportedby a bolt 63 engaging in a slot 64 formed in thecorresponding upright 31. The reciprocating motion is i1nparted to theroll by edge cams 06, 06, throu h either end, with which the cams makeroiling contact.

An endless carrier or belt 69 passes loosely over the lower roll 51 anda rear roll T0, which is journaled at either end in a pillow block 1.

Thus, while the revolving rolllil is out of pressing engagement with theupper roll, the carrier remains stationary; but when the roll iselevated into pressing engagement therewith, the carrier is frictionallyengaged by the rolls and caused to travel in the same directiontherewith. i i

The lower roll is accompanied in its reciprocating motion by a pair ofspaced supports or shelves 73, 74 for maintain W the parts to bepressed, accurately in'place between the rolls. The front. shelf 73 maybe secured to the blocks 62 by passing the bolts 63 through suitableopenings formed therein. The rear shelf 74 is spaced from the frontshelfsufli-' ciently tovpermit the rolls to be hroughtinto pressingengagement with-one another,v and 'is' secured at each end by a screw75. to the block 62. For removing adhesive from the surfaces contactingwith the parts, doctors or scrapers 78 and 79, respectively engaging thesurface of the upper press roll and the. surface of the endless carrier,are provided.

It is of course. evident that it is desirable to, maintain thethermoplastic adhesive in plastic or adhesive condition while the partsare undergoing the pressing operation in order to unite orbmd themtogether effectively. Hence provision is made for heatin one of therolls, preferably theupper roll, which directly. contacts with the partsto beunited.

This may be accomplished in a practical and convenientmanner byinserting a removable electric heating unit 80 into a suitable chamberor compartment formed within the roll. The heating unit may be connectedthrougl the conductors 81, 81to-the rheostat 4;, by means of which theamount of current supplied thereto and thusits temperature, may becontrolled. Tn startmg upthemachine n the morning, the rheostat is setand the switch 5 is thrown on, whereupon the device 2 is kept goinguntil the thermoplastic adhesive has become sufic1ently plastic tocommence operation. The switch 5 may then be thrown offend the heatsupplied to the tank by radiaion from the upper press roll locatedimmediately thereunder in an arcuate space afforded by thec'onstructlonof the bottom of the tank is ordinarily suficient to maintain theadhesive in proper condition. It should be obvious however that heatingmaybe dispensed with in a machine where a cement or adhesive notrequiring heat is employed.

The various rolls are preferably driven from a common motor or othersource of power (not shown), which may be built into the machine, ifdesired through a. belt by a pulley 82 loosely mounted on the drivingshaft 100. The shaft is provided at one end with a tooth clutch member 81 having a feather key 85- engaging'in a longitudinal groove 86 formedin the shaft ina manner to permit axial or longitudinal movement of themember This movement permits it to be engaged with ,or disengaged fromthe other clutch member 8.2011 the pulley 82, so that rotation may beimparted to the shaft 100 as desired. The axial movementmay be impartedto the clutch member 84 through rollers 88, 88 engaging in an annularway 87 formed thereon. The rollers are mounted on theforks afforded by ayoke 89, the opposite end of which is affixed to a rock shaft 90 suitably journaled in a bearing'91. To the outer ment with the complement-a1clutch member 82 on the driving pulley 82.

The cam shaft 67 is driven from the shaft 100 by a sprocket 93, througha chain 94 passing over a sprocket 95 fixed at one end of the shaft 100.The rolls 51 and 52 are driven through thechain 96 passing over asprocket 9'? fixed at one end of the shaft til and passing oversprockets 98, 99 fixed to the respectiverolls, The chain 96 also passesover a sprocket 101 fixed at one end of a shaft 102, which serves as adriving shaft for the adhesive-applying roll. The shaft 102 is journaledin a bearing block 105 which is bolted to a bracket 106 secured. to theblock 56. The other end of the shaft 102 is provided with a sprocket109, overwhich a chain 110 passes, driving the roll 7 through thesprocket 111 fixed at one end thereto. The chain 96 preferably alsopasses over an idle sprocket 112 fixed to a shaft 113 which is journaledin a block 114. This block is-supported so as to be horizontallyadjustable so that the chain are at this particular time lowered inposition for their reception. With the parts placed therebetween, thelower press roll is reciprocated into pressing engagement with the upperpress roll, and the endless carrier is caused to travel the direction ofthe rolls by frict-ional engagement therewith, in a manner to feed theparts forwardly between the nip of disengagement the press rolls occurpressing engagement.

I the rolls onto the front shelf 73, from which they fall and aredischarged into a basket 76 attached to the frame. The lower roll isthen reciprocated out of pressing engagement with the upper roll,whereupon the eject-ion of an adhesive-coated blank from the magazineagain occurs, and the sequence of steps is re peated. Thus the ejectionof a blank and the l at properly timed intervals, so that the operatorhas sullicient time to assemble the blank with the upper and then placethe parts between the press rolls before they are brought into Theendless carrier affords a resilient cushion between the sur faces of thepress rolls, on which any excess adhesive which is squeezed from theparts is deposited. With the large surface afforded by the endlesscarrier, if a port-ion of the surface is gummed up with adhesive in apress ing operation, the shoe upper undergoing treatment inthesucceeding pressing operation remains unaffected, and is not smeared orsoiled therewith, since another carrier is presented for the new p ngoperation. Such a carrier is especially advantageous when athermoplastic adhesive is employed, since when, the gummed-up surface ofthe carrier is again available for a pressing operation, thethermoplastic adhesive deposited thereon has become suliicientlycongealed or hardened to lose its adhesivcness and will not tend tosmear or soil the upper.

Having thus described this invention, it is evident that various changesmight be resorted to in form, construction and arrangement of the partswithout departing from the spirit or scope of the invention. Hence We donot wish to limit ourselves strictly to the structure herein set forth.

What we claim is p 1. .In'a machine of the class described, a pair ofpress rolls, means for positively rotating both said rolls, means forbringing the rolls into and out of pressing engagement at regularintervals during such rotation, and an endless carrier passing lOOSOlyover one of said rolls and actuable by said rolls only while in pressingengagen'ient to travel in the direction of the confrontin surfaces ofsaid rolls.

2. In a machine of the class described, a

pair of press rolls, means tor positively rotating both said rolls,means for reciprocating one otsaid rolls into and outofQl'GHSlIlQ'Gllgagement with the other roll at regular intervals duringsuch rotation, and an endless carrier passing loosely over one of saidrolls an d between the two rolls. 7

In a machine of the class described, a

pair of superposed press rolls, means for posi-c tively rotating bothsaid rolls, means forre clprocating the lower roll into and out ofpressing engagement with said upper roll at regular intervals duringsuch rotation, and an endless carrier passing loosely over said lowerroll and actuable by said rolls only while in pressing engagement totravel in the direction of the confronting. surfaces of said rolls.

L. In a machine of the class described, a pair of superposed pressrolls, the upper roll of which is yieldingly mounted, means for.

of which is yieldingly mounted; means for positively rotating both saidrolls; means for reciprocating the lower roll into and out ofpressingengagement with the upper roll at regular intervals during suchrotation; an endless carrier loosely passing over said lower roll andactuable bysaid rolls only while in pressin engagen'ient to travel inthe direction of the confronting surfaces of said rolls and means foradjusting the pressing action excrted by said rolls.

6. In a machine ofthe class described, a pair of superposed press rolls;means for positively rotating both said rolls; means for reciprocatingthe lower roll into and out of pressing engagement with the upperv rollat regular intervals during such rotation, an endless carrier passingloosely over said lower roll and actuable by said rolls only while inpressing engagement to travel in the direction of the confrontingsurface of said rolls; and .means for supporting the material to bepressed, placed between said rolls.

7. In a machine of the class described, a pair of'superposed pressrolls; means for positively rotating both said rolls; means forreciprocating the lower roll into and out of pressing engagement withthe said upper roll at regular intervals during such rotation; an

endless carrier passing loosely over said, lower roll and actuable bysaid rolls only while in pressing engagement to travel in the direc tionof the confronting surfaces of the rolls; and supports reciprocatingwith said lower roll, for supporting the material to be pressed placedbetween the rolls.

8. In a machine of the class. described, a pair of superposed pressrolls, the upper roll of which is yieldingly mounted; means forpositively rotating both said rolls; means for reciprocating the lowerroll into and out of pressing engagement with said upper roll at regularintervals during such rotation; an"

endless carrier passing over said lower roll and actuable by said rollsonly while in pressing engagement to travel in the: direction of theconfrontingsurfaces of said rolls; means for adjusting the pressingaction exerted by said rolls; and supports reciprocating with the lowerroll for maintaining the material to be pressed, emplaced between therolls.

9. In a machine of the class described, the combination of a magazinefor supporting a stack ois'uperposed blanks; means for applying anadhesive to the lowermost blank of said stack and for ejecting saidblank from said magazine after the application 01" such adhesive; a pairof pressing members; and means synchronized with said adhesive applyingand blank ejecting means for bringing said members into pressingengagement with one another during the application of adhesive to ablank, and out of pressing en gagement when a blank has been ejectedfrom said magazine. I

10. In a machine of the class described, the combination of a magazinefor supporting a stack of superposed blanks; means for applying anadhesive to the lowermost blank of said stack and for ejecting saidblank from said magazine after the application of such adhesive; a pairof superposed press rolls; means for rotating said rolls; meanssynchonized with said adhesive applying and blank ejecting means forreciprocating the lower roll into pressingengagement with said up perroll during the application of adhesive to a blank, and out of pressingengagement with the upper roll when a blank has been ejected from saidmagazine; and an endless carrier passing loosely over said lower rolland between the two rolls.

11.- The combination, in a machine of the class described, of a magazinefor supporting and guiding a stack of blanks; a tank for containingan-adhesive; an adhesive-applying roll partially submerged in saidadhesive and contacting with the under face of the lowermost blank;means for rotating said roll; a series of prongs arranged longitudinallyon the periphery of said roll and adapted to engage the lowermost blankin a manner to eject it from said magazine; a pair of superposed pressrolls; means for rotating said rolls; means for reciprocating the lowerroll into pressing engagement with said upper roll during theapplication of adhesive to a blank, and out of pressing en gagement withthe upper roll when a blank has been ejected from said magazine; and anendless carrier passing loosely over said lower roll and between the tworolls.

12. In a machine of the class described, a pair of rolls, means forpositively rotating both said rolls, means for periodically bringing therolls into and out of pressing engage ment during said rotation, meansfor heating one of said rolls, and an apron passing loosely over heother of said rolls and between the two rolls.

' 1. a machine of the class described, a pair of rolls in superposedrelation, means for rotating said rolls, means for reciprocating thelower rollinto and out of pressing engagement with the upper roll, anapron passing loosely over the lower roll and actuable by said rollswhile in pressing engage ment to travel in the direction of theconfronting surfaces oi said rolls, a magazine for supporting a stack 01blanks, means for applying adhesive to the bottom-most blank andejecting it from the magazine, a tank for adhesive, means for supportingsaid tank above and in close juxtaposition to said upper roll, and meanswithin the upper roll for heating the roll and the contents of the tank.

14. In a machine of the class described, a magazine for a stack ofblanks, means for applying adhesive successively to the blanks, a tankfor adhesive and means for heating said tank and for pressing blanks,said heat ing and pressing means comprising a pair of press rolls, oneof said rolls being located beneath and close to said tank and having aheating element therewithin.

In testimony whereof we have affixed our signatures.

: MELVIN 0. JENNINGS.

LYMAN E. ALLEY.

